<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>

  <script type="text/javascript">
    var a = 100;
    var b = "100";
    alert(a==b);
    window.alert(a===b);
    console.log(a==b);
    console.log(a===b);

  </script>

</head>
<body>

</body>
</html>